The final expeditions on the World Map, particularly in the Sunken City, serve as the ultimate 'boss fight' against all the game's mechanics combined. These require a deep understanding of resource management, villager needs, trading, and glade event resolution. Every decision carries significant weight.
For these expeditions, ensure your Smoldering City is heavily upgraded. Plan your blueprint choices carefully, aiming for highly efficient production chains. Be prepared to trade extensively and leverage every Cornerstone and Perk. Focus on maintaining high Resolve across all species, as even small drops can be catastrophic. This is where all your learned strategies are put to the ultimate test.